28565447 has 2 divisors, whose sum is σ = 28565448. Its totient is φ = 28565446.

The previous prime is 28565441. The next prime is 28565483. The reversal of 28565447 is 74456582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28565447 - 2¹⁴ = 28549063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28565441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282723 + 14282724.

It is an arithmetic number, because the mean of its divisors is an integer number (14282724).

Almost surely, 2^28565447 is an apocalyptic number.

28565447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28565447 is an equidigital number, since it uses as much as digits as its factorization.

28565447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 41.

The square root of 28565447 is about 5344.6652841876. The cubic root of 28565447 is about 305.6893732221.

The spelling of 28565447 in words is "twenty-eight million, five hundred sixty-five thousand, four hundred forty-seven".